I am an
evolutionary biologist with interests in molecular evolution and the biogeography
of marine organisms. Im interested in using molecular tools to answer
questions about the patterns and processes surrounding speciation.
My current research focuses on the evolution of the gamete recognition protein
bindin in a group of tropical sea urchins in the genus Echinometra.
I am interested in the role that bindin plays in creating a barrier to hybridization
in these urchins and how that is related to the rapid speciation in this
group. The five Indo-west Pacific species of Echinometra represent the most
closely related sea urchin species known. By combining information abut
the biogeographic distribution of these species and detailed study of their
population genetics and the evolution of their mating system, I hope to
be able to describe the process of speciation in this group.
Curriculum vitae (view PDF)
Geyer, L. B. and Palumbi S. R. (Submitted) Conspecific sperm precidence
in two species of tropical sea urchins.
Landry, C., Geyer, L. B., Arakaki Y., Uehara, T. and Palumbi S. R. (In Prep)
A recent speciation event in the Indo-West Pacific: rapid evolution of gamete
recognition and sperm morphology in cryptic species of sea urchin.
Geyer L. B. and Palumbi S. R. (2003) Reproductive character displacement
and the genetics of reproductive isolation in tropical sea urchins. Evolution.
Palumbi, S. R., Grabowski, G., Duda, T., Tachino, N. and Geyer, L. (1997)
Speciation and the evolution of population genetic structure in tropical
Pacific sea urchins. Evolution 51: 1506-1517. View
McDonald, J. H., Verrelli, B. C., and Geyer, L.B. (1996) Lack of Geographic
Variation in Anonymous Nuclear Polymorphisms in the American Oyster, Crassostrea
virginica . Molecular Biology and Evolution 13:1114-1118
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